EFFECT OF UPPER LIMB ON GROUND REACTION FORCES DURING SINGLE-LEG JUMP STOP LANDING TASK
Keywords:
Basketball, Dominant/non-dominant leg, Ground reaction force, Landing.Abstract
Blocking shot is one of the defensive basketball skills where a player raises an arm to block or intercept a shot. To block a shot, a player usually jumps and lands on one leg. Previous study investigated ground reaction forces (GRF) during drop vertical jump. However, there is no previous study that has investigated the effect of single arm motion on GRFs during single-leg landing (SLL). Therefore, the purpose of the study was to investigate and compare the effect of dominant and non-dominant arm raise on GRFs during SLL. Five female basketball players (x̄ age = 20.40 ± 0.44 years old, x̄ weight= 64.80 ± 7.71 kg and x̄ height= 1.71 ± 0.03 m) participated in this study. Participants performed single-leg landing (SLL) onto a force platform on 4 conditions; 1) non-dominant arm raise landing by non-dominant leg (NDA-NDL), 2) non-dominant arm raise landing by dominant leg (NDA-DL) 3) dominant-arm raise landing by dominant-leg (DA-DL) and 4) dominant-arm raise landing by non-dominant leg (DA-NDL). The vertical GRF at maximum results showed significant differences between NDA-NDL vs. DA-DL and NDA-NDL vs, DA-NDL. Whilst, the peak posterior GRF results show no significant difference between 4 conditions. This study shows that non-dominant arm raise has an effect on ground reaction forces. Therefore, researchers suggest that basketball players should practice to improve the use of a non-dominant arm when landing after performing blocking shot for alternatively defense action.
(Journal of Sports Science and Technology 2018; 18(2): 120-127)
Key Words: Basketball, Dominant/non-dominant leg, Ground reaction force, Landing.
*Corresponding author: Weerawat LIMROONGREUNGRAT College of Sports Science and Technology Mahidol University, Nakhon Pathom, Thailand 73170 E-mail: weerawat.lim@mahidol.edu
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